<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>

<body>
    <div id="app">
        输入框1:<input type="text" @input="changeMsg"/>
        输入框2:<input type="text" @input="msg=$event.target.value"/>
        <h1>{{msg}}</h1>
    </div>
    <script>
        Vue.config.productionTip = false;
        /* 
            业务场景：
            input中输入什么，则p标签中展示什么
        */ 

        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    msg:""
                }
            },
            methods:{
                changeMsg(e){
                    this.msg = e.target.value;
                }
            }
        })
</script>
</body>

</html>